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Formaldehyde → (S)-7-Chloro-10-[3-(2-methoxy-ethyl)-4-methyl-piperazin-1-yl]-4H-3-thia-4,9-diaza-benzo[f]azulene

HRID 131477
Notes
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Reaction equation

HRID 131477 reaction equation
[Cl:1][C:2]1[CH:25]=[CH:24][C:5]2[NH:6][C:7]3[S:8][CH:9]=[CH:10][C:11]=3[C:12]([N:14]3[CH2:19][CH2:18][NH:17][C@@H:16]([CH2:20][CH2:21][O:22][CH3:23])[CH2:15]3)=[N:13][C:4]=2[CH:3]=1.C=O.[C:28](O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCl>[Cl:1][C:2]1[CH:25]=[CH:24][C:5]2[NH:6][C:7]3[S:8][CH:9]=[CH:10][C:11]=3[C:12]([N:14]3[CH2:19][CH2:18][N:17]([CH3:28])[C@@H:16]([CH2:20][CH2:21][O:22][CH3:23])[CH2:15]3)=[N:13][C:4]=2[CH:3]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 712FormaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 135434004(S)-7-Chloro-10-[3-(2-methoxy-ethyl)-piperazin-1-yl]-4H-3-thia-4,9-diaza-benzo[f]azulene

Product 1

HCID 136090405(S)-7-Chloro-10-[3-(2-methoxy-ethyl)-4-methyl-piperazin-1-yl]-4H-3-thia-4,9-diaza-benzo[f]azuleneYield 71%

Reagents, catalysts & solvents 1

HCID 6344
Dichloromethane
Solvent

Procedure

Combine (S)-7-chloro-10-[3-(2-methoxy-ethyl)-piperazin-1-yl]-4H-3-thia-4,9-diaza-benzo[f]azulene (571.5 mg, 1.52 mmol), formaldehyde (135.4 μL, 1.67 mmol, 37% in water), and dichloromethane (20.0 ml). Stir the mixture at ambient temperature for 5 minutes and then add sodium triacetoxyborohydride (482.0 mg, 2.27 mmol). After stirring for 30 minutes at ambient temperature, quench the reaction with saturated sodium bicarbonate. Remove the organic portion and wash (brine), dry (sodium sulfate), and reduce the extracts to residue. Purify the residue on silica gel using a gradient of dichloromethane to dichloromethane/methanol (90:10) to give 418.3 mg (71%) of the title compound as a brown foam: mass spectrum (ion spray): m/z=391.1 (M+1).

Workup

  1. stirringAfter stirring for 30 minutes at ambient temperature
  2. customquench
  3. customthe reaction with saturated sodium bicarbonate
  4. customRemove the organic portion
  5. washwash (brine)
  6. dry with materialdry (sodium sulfate)
  7. customPurify the residue on silica gel using a gradient of dichloromethane to dichloromethane/methanol (90:10)

Sources & evidence

ORD record
ord-b6935ab082284e18958c83b6d73bb899
Source dataset
uspto-grants-2008_06
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07384934B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes